<div nz-row [nzGutter]="8">
    <div nz-col class="gutter-row" [nzSpan]="12">
        <nz-input-group [nzPrefix]="prefixLock" [nzSize]="'large'">
            <input nz-input type="text" [(ngModel)]="_validCode" (ngModelChange)="validCodeChange($event)"
                   placeholder="请输入验证码">
        </nz-input-group>
    </div>
    <div nz-col class="gutter-row" [nzSpan]="12">
        <img *ngIf="_validCodeImgUrl" alt="验证码" [src]="_validCodeImgUrl" (click)="fetchValidCode()">
    </div>
</div>
<ng-template #prefixLock><i nz-icon type="lock" class="form-icon"></i></ng-template>
